Rotary engine



(No Model.) v 3 Sheets-Sheet 1.

C. H. CARY.

ROTARY ENGINE.

INVENTI'JFK.

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ROTARY ENGINE. No.v 392,538. Patented Nov. 6, 1888.

(No Model.) s sheets-sheet 3.

C. H.. CARY.

ROTARY ENGINE. No; 392,538.. Patented Nov. 6, 1888.,

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Nrrn Srarns CHARLES H. CARY, OF W'ARREN, RHODE ISLAND.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 392,538, dated November 6, 1888.

Application filed November 30, 1867. Seria1No.256,5T2. (No model.)

To @ZZ whom iz? may concern,.-

Be it known that I, CHARLES II. CARY, a citizen of the United States, residing at Warren, in the State of Rhode Island,haveinvented a new and useful Improvement in Rotary Engines,of which the following is a specification.

My'inventon relates to that class of rotary engines in which the rotation of the shaft is derived from reciprocating pistons which operate within the radial piston-chambers of arotary head; and it consists in the improved construction and arrangement of the chambers ofthe rotary head and the pistons, and in the improved combination of the same with the shaft and the outer case, as hereinafter fully set forth.

Figure l is a vertical section taken transversely of the aXis of the engine. Fig. 2 is a vertical axial section of the same. Fig. 3 is an end elevation with the left-hand head of the cylindrical outer case removed. Fig.v 4 shows a vertical section of the annular portion ofthe outer case and an edge elevation of the rotary head. Fig. 5 is a plan view of one of the connecting-arms. Fig. 6 is au edge view of the same. Fig. 7 is a vertical section showing a modification.

In the accompanying drawings, a is the cylindrical portion of the outer case, A,which is supported by a base,b, the said base being provided with a passage, c, for the escape of the exhaust-steam or other iiuid from the chamber l ofthe outer case. The headD of the caseis provided with the inwardly-projecting hub C, which forms a stationary valve for the surrounding piston-chambers B B B B of the rotaryhead, the said stationary valve being provided with the induction-port as and the exhaust-port y, the said ports` x and y being preferably arranged diamctrically opposite cach other.

XVithin the radially directed cylindrical chambers B of the rotary head D are placed the pistons F, which upon their inwardly-directed faces are hollowcd with the curvature of the periphery of the stationary valve C. From. a piu or bar, f, which extends diametrically across the pistons F, connection is made with the arm g by means of the connecting-link h. The arm g is firmly held upon a shaft,,which extends from side to side of the rotary head, and upon one end of the shaft t' is firmly sem will alone embrace the eccentric-pin 7c, thereby economizing space and bringing all the connecting-rods in the same plane.

The shaft G is connected to the rotary piston-head D by means of the spider-plate q, which is irmly keyed to the said shaft and bolted to the side of the rotary head D, the said shaft G passing outward through the hub r of the head s of the outer case.

The stationary valve Gis made tapering,and the rotary head is made to fit the tapering valve, and the proper ad]- ustment can be made for tightening the joint between the stationary valve and the rotary head by means of the co1- lar t on the shaft G, the screw-cap a, which screws upon the end of the hub r, and the adjustable collar o, which is held upon the shaft G by means of the set-screw w. The steam or other operating-fluid can pass through the pipe H, and thence to the induction-port w, and after actuating the adjacent piston, F, in the chamber B, thus causing the revolution of the rotary head in the direction of the arrow, Fig. 1, the said pistonchamber will be brought to the exhaust-port Q from which the operatingfluid will pass through the passager: into the chamber d of the outer case, and from the chamberd the said operating-Huid will pass out at the passage o. The pistons F are hollowed upon their faces a to conform to the curvature of the stationary valve C, thus preventing clearance waste of steam in running the engine, which is a very desirable feature in a rapidly-revolving rotary engine. Ipreferably continue the chambers B to the periphery of the stationary valve C, whereby the rotary head D will be freed from the inwardlydirected pressure of the steam in the pistonchamber, thus greatly reducing the friction and wear in such engines, and in this case the stationary valve C serves to form the resistinghead of the piston-chamber.

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The spider-plate q, which serves to connect the shaft G to the rotary head D, is cutaway at the points b2 to allow the connectingrods m to pass and form a connection with the eccentric-pin b; but such open construction will be rendered unnecessary when the spider-plate is made sufficiently large to extend beyond the extreme limit ofthe movement of the arms j, as shown in Fig. 7, and in this case the connecting-rods m and the eccentricpin 7c will be held in a chamber, c', between the spider-plate and the face of the rotary head D, anda proper perforation, d', can be made at any desirable point in the spider-plate for the passage oi' the steam or other operating-fluid from the chamber c to the chamber d of the outer case.

In the foregoing description of my invention I have described the steam or other operatingiiuid as passing in at thc pipe H and out of the passage c in the base b; but it is evident that a rotary movement of the piston-head D will be produced in a reverse direction if the operating-Huid is made to enter at the said passage c and exhaust from the said pipe II. Therefore either the live or exhaust steam may be made to occupy the chamber d of the outer case, as desired.

I claim as my invention- I. In a rotary engine, the combination,with the stationary valve provided with inlet and exhaust ports and the eccentric-pin, of the rotary head fitting the periphery of the said valve and provided with radially-directed pistonchambers, the reciprocating pistons operatively connected to the eccentric-pin, the spider-plate attached to the rotary head, and the shaft extending outward from the spider-plate, substantially as described.

2. In combination, an outer case provided with inlet and outlet passages for the operating-fluid, a stationary valve extending inward from one head or end of the outer case, and provided with ports, one of which is in communication with the chamber of the outer case, the eccentric-pin, a rotary head tting the periphery of the valve and provided with radially-directed piston-chambers, the pistons iit-V ting thesaid piston-chambers and operatively connected with the eccentric-pin, the spiderplate attached to the rotary head, and the shaft extending outward from thespider-plate, substantially as described.

CHARLES II. CARY. Vitnesses:

SooRn'rEs SCHOLFIELD, JOHN S. LYNCH. 

